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Analysis, design, and optimization of structures with integral compliant mechanisms for mid‐frequency response
Author(s) -
Dede Ercan M.,
Hulbert Gregory M.
Publication year - 2007
Publication title -
international journal for numerical methods in engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.421
H-Index - 168
eISSN - 1097-0207
pISSN - 0029-5981
DOI - 10.1002/nme.2084
Subject(s) - truss , broadband , finite element method , range (aeronautics) , frequency response , energy (signal processing) , vibration , noise (video) , scale (ratio) , attenuation , acoustics , computer science , structural engineering , engineering , mathematics , physics , aerospace engineering , telecommunications , electrical engineering , optics , quantum mechanics , artificial intelligence , image (mathematics) , statistics
A multi‐scale paradigm is proposed that utilizes periodic, small‐scale, integral compliant mechanisms within larger‐scale structures for the attenuation of vibro‐acoustic response. Amplification principles serve as the basis for the design of these mechanisms in achieving reduced energy transmission. The spectral finite element method is exploited for a force–velocity and energy flow analysis of the resultant truss‐like structures. A genetic algorithm is employed to optimize structure size for greatest effectiveness in the frequency range of interest. This study demonstrates that a significant decrease in structural vibration is achievable and suggests promising applications including the design of acoustic isolation panels for broadband vehicle noise reduction. Copyright © 2007 John Wiley & Sons, Ltd.